package collection;
import com.sun.scenario.effect.impl.sw.sse.SSEBlend_SRC_OUTPeer;

import java.util.ArrayList;
import java.util.Collection;
//collection接口的演示
public class CollectionDemo {
    public static void main(String[] args) {
        Collection c=new ArrayList();
        c.add(new Point(1,2));
        c.add(new Point(3,4));
        c.add(new Point(5,6));
        c.add(new Point(7,8));
        c.add(new Point(9,0));
        c.add(new Point(1,2));
        System.out.println(c);

       // boolean contains(Object o)
       // 判断当前集合是否包含给定元素o
       // 判断依据是给定元素是否与当前集合存在equals()比较为true的情况
        Point p=new Point(1,2);
        boolean contains=c.contains(p);
        System.out.println("是否包含："+contains);

        //从当前集合中删除与给定元素o的equals()比较为true的元素
        //若存在重复元素则只删除一次
        c.remove(p);
        System.out.println(c);

        Collection cc=new ArrayList();
        Point pp=new Point(1,2);
        cc.add(pp);
        System.out.println("pp:"+pp);
        System.out.println("cc:"+cc);

        pp.setX(100);
        System.out.println("pp:"+pp);
        System.out.println("cc:"+cc);

        Point pp2=new Point(1,200);
        pp.setX(pp2.getX());
        pp.setY(pp2.getY());
        System.out.println("pp:"+pp);
        System.out.println("cc:"+cc);

        /*
        Collection c=new ArrayList();
        c.add("one");
        c.add("two");
        c.add("three");
        c.add("four");
        c.add("five");
        //集合重写了Object的toString()方法
        System.out.println(c);

        //size()输出集合的元素个数
        System.out.println("size:"+c.size());

        //isEmpty()判断集合是否为空集
        System.out.println("是否为空集："+c.isEmpty());

        c.clear();//清空集合
        System.out.println("集合已清空");

        System.out.println(c);
        System.out.println("size:"+c.size());
        System.out.println("是否为空集："+c.isEmpty());

         */
    }
}
